Reinforcing means for concrete construction.



M. C BUYER.

REINFORClNG MEANS FOR CUNCRETE CGNSTRUCTIUN.

APPLICATION FILED uovii, 19x0. 1,147,603.

A 5 4 u V I C a w BEINFORCING M BOYEB. R CRETE CONSTRUCTION N Fl 0V- 7, i910.

Patiented July 20, 1915. 2 SHEET SSHEET 2:

UNITED OFFICE.

MURRAY 0. BOYEB, F RIVER/DON,- u'Ew EY; Asst NOR T0 PHILADELI I-IIA STEEL & WIRE 00., 0F PHILADELPHIA, PENNsYEVA-NI'AA- eo-i'tronA'rzon OF NEW JERSEY.

REINFORCING MEANS Eon actresses G'GNSTEUCTION.

Specification of Letters Patent.

Patented July 20, 1915.

Application filed November 7, 1910. Serial No. 591,122

To all whom it may concern:

Be it known that I, MURRAY C. Boyini, a citizen of the United States, and a resident of Riverton, Burlington county, New Jersey,

have invented certain Improvements in Reinforcing Means for Concrete Construction,

of which the following is a specification.

My invention. relates to reinforcing means for concrete construction, and it consists of certain improvements in deformed bars or rods more fully described hereinafter and shown in the accompanying drawings, in which:

Figure 1, is an elevation of a. deformed bar embodying my invention; Fig. 2, is a cross-seetional view of the same; Fig. 3, is a perspective view of the bar shown in Fig. 1, and Figs. l to 12, both inclusive, illustrate other deformed bars within the scopeot' my invention.

The purpose of metallic reinforcing means I; is thought to be so well known as to require no extended discussion, and the object of using a deformed bar is to increase the revsistance to separation of the reinforcing bar and the concrete under the strains of tension. 'Myinvention comprehends the use of bars of substantially the same area throughout theirlength with individual isolated projectioiis or fins to offer the desired resistance to longitudinal movement in the mass of concrete. .These projections may be disposed at stag ered intervals throughout the length of the ars. In the polygonal or rectanguigf hirbars, the projections are disposed at diagonally opposite corner edges, extending part way across the plain faces of the bars adjacent such corner edges, and the latter are preferably rounded. In other words 10 my improved bar has individual isolated projections in staggered relation disposed at diagonally opposite sides of the bar and having their greatest cross sectional area upon the flat sides of said bar. This constrnction offers no dilliculty in the rolling of the bar with the projections formed integral therewith.

in the preferred form, the projections describe an arc of a circle from one plane surface of the bar to another adjacent the a raised portion 3 substantially centrally disposed in thatportion of the projection adjacent each of two plane surfaces of the. bar is shown.

In Figs. 7, 8 and 9, the outer edges of the projections 2 parallel the plane surfaces of the bar, joining in a curved outline around corner edges of the same.

In the embodiment of my invention shown in l igs. 10,11 and 12, l provide a bar 1 having a rounded or curved cross section;.'-

elliptical or oval, for instance; the projec tionsQ being disposed on opposite sides of the broad surfaces of the same in staggered relation and extending from the curved portions of short radius only a part way over said surfaces.

In all instances, the projections are preferably of rounded contour and blendwitli the plane or curved surfaccs'of the bars at their ends.

SlICG all of the bars are of substantially uniform cross section throughout their length and have the friction producing means in the formof projections providing an added amount of metal, there? is no dilliculty in the operation of bending the same' to form truss members or danger of fracture during such bending. "The disposal of theprojections inthe manner indicated provides the necessary amount of frictional resistance to longitudinal movement without an excess of metal. i

I claim:

1. A straight barfor reinforced concrete construction having individual isolated projections in staggered relation disposed at diagonally opposite surface portions of the bar, said projectidns being arched and having their greatest} cross sectional area centrally disposed with respect to said arched portion, and sai'd projections lying iii planes parallel to the transverse axis of the bar and being disposed substantially at regular intervals; with plain portions of the bar between the projections and plain portionsextending longitudinally of the bar intermediate the rows of projections.

2. A bar for reinforced concrete construction having a plurality of faces and a plu-' i'ality of corners, a series of individual isolated pro ections disposed on all the faces of said bar, said projections having their greatest cross sectional area upon such faces and 

